Cleaning Decks and Patios With a Pressure Washer

Cleaning decks and patios with a pressure washer can restore a dull surface, but the wrong pressure or nozzle can damage wood, mortar, or sealant. A careful method gives a clean result without harming the surface.

Start with a test spot, work in sections, and keep the spray moving. This guide covers preparation, pressure, and safe cleaning steps.

Prepare the surface first

Remove furniture, pots, and loose items. Sweep away dirt, leaves, and grit, because loose grit can scratch a surface under pressure.

Check for loose boards, cracked joints, or damaged mortar. Fix or mark problem areas before washing, so pressure does not make them worse.

Choose pressure and nozzle with care

Use the lowest pressure that cleans well. Wood decks are easier to damage than concrete, so keep pressure lower and distance greater on wood.

Start with a wider fan nozzle, and test on a hidden spot. A narrow jet can cut wood fibers and leave marks that are hard to repair.

Check your washer manual for nozzle and pressure guidance for your model. Manual settings matter, because machines differ in power and spray pattern.

Work in sections and keep moving

Work in small sections, from high to low, and keep the spray moving in even passes. Do not hold the nozzle in one spot, because that can gouge wood or wash out joints.

Keep a steady distance and overlap passes slightly. This avoids stripes and helps the surface dry evenly.

Cleaning wood decks

For wood, spray along the boards, not across them, and avoid spraying into end grain at close range. Let the surface dry, then check for raised fibers or loose boards.

Do not expect a pressure washer to fix rot or deep stains. Cleaning helps appearance, but damaged boards still need repair or replacement.

Cleaning patios and concrete

Concrete and stone can take more pressure, but mortar joints and soft stone still need care. Test joints first, and avoid blasting sand or mortar out of gaps.

For grease or heavy dirt, pre-treat as your cleaner directs, then rinse from the far side toward a drain or edge, away from plants and people.

After rinsing, check joints and edges again. Replace washed out joint sand only as your patio product directs, and let the surface dry fully before sealing.

Drying and final checks

Let the surface dry fully before you move furniture back. Wet wood can mark easily, and wet stone can stay slippery longer than it looks.

Walk the area in daylight and look for missed spots, stripes, or damage. A small touch up is easier than a full second wash, and it keeps the finish even.

Safety and cleanup

• Wear eye protection and closed shoes.
• Keep hands and feet clear of the spray.
• Keep the spray away from people, pets, and windows.
• Check hoses and fittings before you start.

After washing, rinse tools and hoses, coil them without kinks, and store them dry. Check the surface after it dries, and reseal wood or stone only as your product directs.

When not to pressure wash

Do not pressure wash loose paint, soft or rotten wood, or surfaces with known damage until they are repaired. A gentle wash or hand cleaning may be safer in those cases.

If you are unsure about the surface, test a small area first, or ask a qualified person for advice before using full pressure.

Conclusion

Clean decks and patios by preparing the surface, testing pressure, working in sections, and keeping the spray moving. For washer help, browse the Shop. To learn more, read the About us page. For help, use the Support page or the Contact us page.